<!DOCTYPE html>
<html>
<head>
<title>14</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
/* GitHub stylesheet for MarkdownPad (http://markdownpad.com) */
/* Author: Nicolas Hery - http://nicolashery.com */
/* Version: b13fe65ca28d2e568c6ed5d7f06581183df8f2ff */
/* Source: https://github.com/nicolahery/markdownpad-github */

/* RESET
=============================================================================*/

html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
}

/* BODY
=============================================================================*/

body {
  font-family: Helvetica, arial, freesans, clean, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
  padding: 20px;
  max-width: 960px;
  margin: 0 auto;
}

body>*:first-child {
  margin-top: 0 !important;
}

body>*:last-child {
  margin-bottom: 0 !important;
}

/* BLOCKS
=============================================================================*/

p, blockquote, ul, ol, dl, table, pre {
  margin: 15px 0;
}

/* HEADERS
=============================================================================*/

h1, h2, h3, h4, h5, h6 {
  margin: 20px 0 10px;
  padding: 0;
  font-weight: bold;
  -webkit-font-smoothing: antialiased;
}

h1 tt, h1 code, h2 tt, h2 code, h3 tt, h3 code, h4 tt, h4 code, h5 tt, h5 code, h6 tt, h6 code {
  font-size: inherit;
}

h1 {
  font-size: 28px;
  color: #000;
}

h2 {
  font-size: 24px;
  border-bottom: 1px solid #ccc;
  color: #000;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

h5 {
  font-size: 14px;
}

h6 {
  color: #777;
  font-size: 14px;
}

body>h2:first-child, body>h1:first-child, body>h1:first-child+h2, body>h3:first-child, body>h4:first-child, body>h5:first-child, body>h6:first-child {
  margin-top: 0;
  padding-top: 0;
}

a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
  margin-top: 0;
  padding-top: 0;
}

h1+p, h2+p, h3+p, h4+p, h5+p, h6+p {
  margin-top: 10px;
}

/* LINKS
=============================================================================*/

a {
  color: #4183C4;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* LISTS
=============================================================================*/

ul, ol {
  padding-left: 30px;
}

ul li > :first-child, 
ol li > :first-child, 
ul li ul:first-of-type, 
ol li ol:first-of-type, 
ul li ol:first-of-type, 
ol li ul:first-of-type {
  margin-top: 0px;
}

ul ul, ul ol, ol ol, ol ul {
  margin-bottom: 0;
}

dl {
  padding: 0;
}

dl dt {
  font-size: 14px;
  font-weight: bold;
  font-style: italic;
  padding: 0;
  margin: 15px 0 5px;
}

dl dt:first-child {
  padding: 0;
}

dl dt>:first-child {
  margin-top: 0px;
}

dl dt>:last-child {
  margin-bottom: 0px;
}

dl dd {
  margin: 0 0 15px;
  padding: 0 15px;
}

dl dd>:first-child {
  margin-top: 0px;
}

dl dd>:last-child {
  margin-bottom: 0px;
}

/* CODE
=============================================================================*/

pre, code, tt {
  font-size: 12px;
  font-family: Consolas, "Liberation Mono", Courier, monospace;
}

code, tt {
  margin: 0 0px;
  padding: 0px 0px;
  white-space: nowrap;
  border: 1px solid #eaeaea;
  background-color: #f8f8f8;
  border-radius: 3px;
}

pre>code {
  margin: 0;
  padding: 0;
  white-space: pre;
  border: none;
  background: transparent;
}

pre {
  background-color: #f8f8f8;
  border: 1px solid #ccc;
  font-size: 13px;
  line-height: 19px;
  overflow: auto;
  padding: 6px 10px;
  border-radius: 3px;
}

pre code, pre tt {
  background-color: transparent;
  border: none;
}

kbd {
    -moz-border-bottom-colors: none;
    -moz-border-left-colors: none;
    -moz-border-right-colors: none;
    -moz-border-top-colors: none;
    background-color: #DDDDDD;
    background-image: linear-gradient(#F1F1F1, #DDDDDD);
    background-repeat: repeat-x;
    border-color: #DDDDDD #CCCCCC #CCCCCC #DDDDDD;
    border-image: none;
    border-radius: 2px 2px 2px 2px;
    border-style: solid;
    border-width: 1px;
    font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
    line-height: 10px;
    padding: 1px 4px;
}

/* QUOTES
=============================================================================*/

blockquote {
  border-left: 4px solid #DDD;
  padding: 0 15px;
  color: #777;
}

blockquote>:first-child {
  margin-top: 0px;
}

blockquote>:last-child {
  margin-bottom: 0px;
}

/* HORIZONTAL RULES
=============================================================================*/

hr {
  clear: both;
  margin: 15px 0;
  height: 0px;
  overflow: hidden;
  border: none;
  background: transparent;
  border-bottom: 4px solid #ddd;
  padding: 0;
}

/* TABLES
=============================================================================*/

table th {
  font-weight: bold;
}

table th, table td {
  border: 1px solid #ccc;
  padding: 6px 13px;
}

table tr {
  border-top: 1px solid #ccc;
  background-color: #fff;
}

table tr:nth-child(2n) {
  background-color: #f8f8f8;
}

/* IMAGES
=============================================================================*/

img {
  max-width: 100%
}
</style>
</head>
<body>
<h2>插件解析</h2>
<p><img src="14_images\144.png" alt="144" /></p>
<h3>数据加解密插件【待升级改造，去除置换算法，更改为 混淆算法】</h3>
<h4>功能</h4>
<pre><code>网络传输数据，为确保数据安全，需要针对传输中数据进行： 加密，防篡改，秘钥保护 ；

混淆算法： 防止通过对常用算法的参数数据进行切面截获，自定义混淆数据算法；

3DES对称加密： 对数据主体进行性能消耗小的3DES算法加密，随机加密盐值；

RSA加密： 3DES盐值，数据量小通过RSA非对称加密，确保主体加密盐值的传输；

RSA签名： 防止需要保护的数据被篡改；
</code></pre>

<h3>Token认证插件</h3>
<h4>功能</h4>
<pre><code>token生成： 业务服务（micro-service）登录确认后，将用户信息推送到网关认证服务（auth-service）,生成token信息，缓存到redis；

token验证： 接口配置token认证插件时，将缓存redis绑定到对应接口，进行token验证；
</code></pre>

<h3>授权插件</h3>
<h4>功能</h4>
<pre><code>判断用户是否具备访问此API的权限

API权限信息缓存到网关，权限级别：角色权限管理机制；
</code></pre>

<h3>停服插件</h3>
<h4>功能</h4>
<p>为满足后端业务服务，停机维护；</p>
<p>通过网关直接响应客户端，以便发布公告，保障客户端的友好体验；</p>
<p>通过配置不同停机维护代码，满足分区维护需求等；</p>
<h3>链路跟踪插件</h3>
<h4>功能</h4>
<p>将全链路日志扩展到Kong网关, 通过使用APP的请求ID为traceId, 可以通过traceId查询从APP前端请求到后端服务的整个调用路径.</p>
<h3>限流插件</h3>
<h4>功能</h4>
<p>限流可以认为是服务降级的一种，限制系统的流量，达到保护系统的目的。
一般来说系统的吞吐量是可以被测算的，为了保证系统的稳定运行，一旦达到的需要限制的阈值，就需要限制流量并采取一些措施以完成限制流量的目的。</p>
<p>比如：延迟处理，拒绝处理，或者部分拒绝处理等等。</p>
<p>限流方案：</p>
<ul>
<li>限制资源的链接数；</li>
<li>限制资源的并发请求数；</li>
</ul>
<p>限流维度：</p>
<ol>
<li>基于访问URI限流，确保URI资源的稳定性；</li>
<li>基于客户端IP地址限流，防止特定IP的刷单行为；</li>
<li>基于客户端用户限流，防止特定用户的刷单行为；</li>
</ol>

</body>
</html>
<!-- This document was created with MarkdownPad, the Markdown editor for Windows (http://markdownpad.com) -->
